Thread-cutter for looms



E. H. RYON. THREAD CUTTER FOR LOOMS. 4 APPLICATION HLED 020.12. 191s.

Patented Feb, 1, 1921.

2 SHEETS SHEET L E. H. nYoN. THREAD'CUTIER FOR LOOMS. APPLICATION FILED DEC. I2, IHIU 1,366,949. Patented Feb. 1, 1921.

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Specification of Letters Patent.

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Application filed December 12,. 191B. Serial No. 266,387.

To all 'whom t may concern:

Be it known that l, Erna ll. Bron, a citi- .'cen oi the United residing at 'Wah tham., in the county oi' Middlesex and State of il/laseachiisetts, have invented a new and useful rllhread-Cutter `for Looms, el' which the :following is a specification.

This.. invention relates to a thread cutter for looms particularly adapted for use `in connection with `automatic Wett replenishiupf niechanisrn.

lt isthe general ohjeet ot my invention to provide an improved construction ol thread cutter hy which this operation may he performed with accuracy and ellicieney.

With this general ohjeet in vieni, ,an iinportant Yleature of Iny invention relatesto the provision of a thread cutter normally held inoperative hutreleasahlehy the downvvaitl movement ot the incoming Wett carrier upon 'the occurrence of transiter. Another and very important feature ot ,my invention Vrelates to the provision oit a thread cutter Which is held inoperative when en gagged by the lay and which performs its cutting; operation as `the `lay nieves haclmvard aivay :trono the fell of the cloth.`

Further features ot my invention relate to lthe provision of resetting,` devicespreferably associated with the transferring; mechanism,

` to the provision of a novel and' ei'lieient cutter, and to other arrangements and coinhinatiene of parts hereinafter described and more particularly pointed out in the appended clailns. l

A preferred forno ofV my invention is shown in the drawings, in which Figure `1 is a plan View ci iny improved 'thread cutter Fig. 2 is a side elevation thereof;

Fig. 3 is a partial sectional elevation taken along the line 3-3 in Fig. 1;

Fig. Ll is a view similar to Fig. 3,1iut show ingr the parts in a `different position, and

Fig. 5 is a side elevation of a portion el the Weit carrier magazine and the mechanisin 'for releasing the thread cutter.

ln its preferred `torno, niy improved thread cutter is mounted upon `and lforine a part of the temple adjacent the welt car rier magazine. ln Fig. 1 l have shown a temple 10 mounted upon a slide 11 movable in a guide 12 adjustaloly secured to a stand 13 which in turn is lixed to the breast beam 1li. These parts are oi the usualtype .and the slide 11 is normally forced yieldingly rearward or toward the layl. A pocket or recess 16 is `orined in the headlot theslide 1l, shown in Figs'l and A1, and cutters `17 and 18 are slidahly mounted itherein.` The cutter 117 is provided with `slots 19 and l20 through 'which extend pinsll `and `22 lined in theslide 11.

The cutter' 18 is pivoted at 23 :tothe `cutter 17 and is provided with an inclined oam slot @il through which extends the pin Q2. lug1 extends laterally from a depending portion .117 of the cutter 17 `and is engaged hy the-lower end of a springf `rnountedon a stud 27 lixed in the slide l1, theiupperend o? the spring engaging a shoulder 1128 on the slide. Wlien the cutters 17 and 118 are free to nieve, the spring 26 ogives thecutter `1'? `a straightdine rearward `movement, and at the sanie time the cani slot in the cutter 118 causes this cutter to receive an angularlcuttint; movement hout its pivotQ-l;

.A lockingr lever is pivoted at 30 to the slide 1l `and entends forward therefrom. r.lhie lever is provided with a shoulder 31 adapted to engage the lug `25 on lthe cutter 1T and to iloclrztlie cutters in their extreme torivard oriopen position as shown `in iFifrs. and 3. T he forwardly extending' portion oit the lever QQ-is providedwith a studBQ positioned jlor engagement lby an arm 33 ifixed to a horizontal .shaft 34:. A `spring 35 is connected at one `end to the stud `27 `on the slide 11 and at theotherend :to `anupvvard extension 36 on the arm "29, the l Spring tenet-` ine; to inovethe lever interlocking position. The `downward extension 17a off `:the `cutter 17 is engaged by the lay 15 `as the latter inoves forward `an d is moved thereby beyond the shoulder 31 of the lever 29, .which immediately `drops to locking `position .after the lui;` 2 liao `moved `:forward trom beneath the shoulder.

f lhe mechanism for releasing); the cutter is ehoivn in Fig. 5, in which l lhave shownv portions of a Welt carrier `magazine 10. on which a tra sterrer 4l 1s plvoted `at 112. The

details oi. the magazine form .no part of my present `invention and are not shownaherein, lout may he of the general type `shown in `my copendingg application Serial No. 244,637, tiled July 12, 1918, For the purposes of this application it is merely necessary to Vgages the rod bearing 47.

state that the weft carriers are released after indication and move downward between the fixed guide 43 and the yielding guide 44 to the position indicated at W in Fig. 5. Upon the next downward movement of the transferrer the fresh weft carrier is forced downward into the shuttle, and the exhausted weft carrier is simultaneously ejected therefrom.

As the incoming weft carrier moves downward, the butt of the carrier engages Pod 45 slidable in bearings 46 and 47 on the magazine 40, the rod being moved forwardly or to the left in the drawing as the weft carrier descends. The front end of the rod engages a screw 48 threaded into a projection on a latch 49 pivoted at 50 to the magazine 40. The screw 48 forms in effect an adjustable shoulder on the latch 49 for engagement by the rod 45. At its lower end the latch is provided with a hook 51 which engages an arm 52 on the outer end of the shaft 34 previously described. A spring 53 holds the adjusting screw 48 against the end of the rod 45 and rearward movement of the rod is limited by a collar 54 which en- The transferrer is operated by a rod 55 which is recip'rocated vertically by a cam on the loom cam shaft once in every two picks K of the loom. The rod 55 carries a resetting arm 56-'which engages the arm 52 on the shaft 34 and raises Vthe same above the hook 51 after the thread-cutting operation.

l I will now briefly describe the general operation of my invention. As the weft carrier Wl is fed to the shuttle by the transferrer 41, the butt of theweft carrier forces thesliding rod 45 to the'left in Fig. 5 and disengages the hook 51 from the arm 52. At thesame time the resetting arm 5G is in lowered position so that the shaft 34 is free to turnrunder the iniluence of a spring 57 (Fig. 1) thereon. As the arm 52 moves downward the arm 33 (Fig. 2) on the shaft 34 moves upward, engaging the stud 32 and lifting the lever 29 to release the cutters, the spring 57 being of sufficient lstrength to overcome the spring 35. The parts are so timed that the downward extension 17a of the cutter 17 will be engaged by the lay 37 whenthe cutters are released, and no cutting action will therefore occur until the lay has moved backa certain distance from the fell of the cloth. As the lay moves rearward and releases the extension 17a of the cutter 17, the cutters 17 and 18 are also moved rearwardly by the spring 26, such movement causing the cutters to move rela tively from the position shown in Fig. 3 to that shown in Fig. 4, severing any weft thread extending between the cutters. The

weft thread has been previously positioned for engagement by the cutters by the for ward movement of the reed as the lay heats up.

I-Iaving thus described my invention, cer` tain novel features thereof will be evident. Attention is called to the fact that the operation ofthe thread cutter, as herein shown, is controlled directly by the incoming weft carrier and that the thread-cutting operation occurs after the lay has passed its front center. My improved thread cutter is also applicable to a loom in which the transferrer is actuated only after indication of transfer, and in such looms the thread cutter may be released by the movement of any part associated with the transferrer.

My improved thread cutter is of particular value in any loom in which the transfer occurs upon the same pick as the indication by the weft detecting` mechanism, as its cutting operation occurs much later than that of other cutters in common use.

While I have shown my invention as leveloped in a thread cutter, certain features of the actuating mechanism are capable of more general application to other devices for acting upon the weft after a weft carrier is transferred. It will be also evident that changes and modifications can be made in my invention as shown herein, by those skilled in the art, without de rartingy from the spirit and scope thereof as set forth in the claims, and I do not wish to be otherwise limited to the details herein disclosed, but what I claim is 1. In a loom, a thread cutter, means to hold said cutter normally inoperative, releasing mechanism therefor operable by en gagement by the incoming weft carrier during transfer, and actuating means for said cutter.

2. In a loom having a. weft carrier transferrer, in combination, a thread-cutter, a detent effective to hold said cutter normally iu operative, means operative during down-- ward movement of said transferrer to withdraw said detent and release said cutter, actuating means for said cutter, and means operated by said transferrer during upward movement thereof, effective to reset said detent.

3. In a loom, a thread cutter, means to hold said cutter inoperative, and releasingl devices therefor controlled by a member interposed in the path of the incoming weft carrier and actuated thereby to release said thread cutter.

In testimony whereof I have hereunto af fixed my signature.

EPPA H. RYON 

